The cathedral complex is built over the ruins of an ancient Roman settlement known as Portus Victoriae Iuliobrigensium.
The 1941 fire that devastated Santander spared the cathedral's lower church, allowing researchers to study its original 13th-century layout.
The remains of the writer and scholar Marcelino Menéndez y Pelayo are interred within the cathedral grounds.
The upper church was extensively modified during the 16th and 17th centuries before the fire necessitated further structural repairs in the 20th century.
The current bell tower was reconstructed following the 1941 disaster to restore the building's historical skyline profile.
The Catedral de Santander, officially the Cathedral of the Assumption of the Blessed Virgin Mary, is a two-story Gothic complex featuring a lower church built in the 13th century and an upper church constructed in the 14th. The structure was significantly restored following the massive 1941 fire that destroyed much of the city center. The lower section, known as the Iglesia del Santísimo Cristo, retains original medieval masonry and vaulting. Inside, visitors find the remains of Saint Emeterius and Saint Celedonius, the patron saints of Santander, housed in a dedicated crypt. The cathedral features a large 19th-century cloister that links the two levels. Its architecture represents a transition from Romanesque to Gothic influences typical of northern Spain. The site is situated on the Cerro de Somorrostro, a historic mound that once held medieval defensive fortifications. Architectural highlights include the pointed arches of the main nave and the preserved late-Gothic funerary monuments.
The courtyard of the cloister, which provides a peaceful view of the stone arcades against the tower.
Visit the lower crypt separately from the upper nave to fully appreciate the difference in architectural eras.
Take time to examine the exterior stone walls for scars and fire-darkened surfaces that survived the 1941 conflagration.
Look for the small interior museum which houses liturgical silver and historical religious artifacts.
Do not attempt to enter the main nave during active liturgical services unless you are there to participate.
The cathedral may close to visitors during religious services or feast days; check local bulletin boards for sudden schedule shifts.
Maintain a low voice inside the sanctuary; remove hats and dress modestly covering shoulders and knees.